Its likely very common on the camaro... GM started using a new panel manufacturing process in these cars that actually debuted on the C6 vette. Its an environmentally friendly process and uses a different set of curing chemicals to harden the plastics. Its also why "new camaro smell" is slightly different than "new car smell" the same chemicals that we all got used to smelling in the interior of a new car (plasticizers, glues, etc) are all being changed. Still smells like a new car, just not the same smell anymore.

For whatever reason the stuff is easily scuffed and holds surface transfers from almost anything that comes in contact with it. Kind of annoying, but not much you can do about it other than clean it when you see it... keeping panels dressed with an interior conditioner will prevent it a little, but not entirely.

As the OP here, I've pretty much figured out it's coming from my ring as I reach for the seatbelt. I think Dylan is right though..just a function of the plastic..use more conditioner and go on. (and fasten seatbelt before closing door)

i use this and pretty much no more white marks. Im sure any product that does the same will fix it. It doesn't leave everything looking super shinny either like how armorall does and i can use it on pretty much everything in the interior.